NASA / JPL-Caltech / Univ. of Arizona
The steep walls of Valles Marineris – a system of canyons that runs along the Martian surface east of the Tharsis region – sometimes fail, creating giant landslides. This provides a clean exposure of the underlying bedrock.
This image of the north wall of Ganges Chasma reveals bedrock with diverse colours and textures, representing different geologic units.
